Phys. Rev. Lett. 101, 097004 (2008) [4 pages]Giant Proximity Effect in a Phase-Fluctuating SuperconductorReceived 29 October 2007; published 28 August 2008 When a tunneling barrier between two superconductors is formed by a normal material that would be a superconductor in the absence of phase fluctuations, the resulting Josephson effect can undergo an enormous enhancement. We establish this novel proximity effect by a general argument as well as a numerical simulation and argue that it may underlie recent experimental observations of the giant proximity effect between two cuprate superconductors separated by a barrier made of the same material rendered normal by severe underdoping. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.097004
DOI:
10.1103/PhysRevLett.101.097004
PACS:
74.45.+c, 74.72.−h, 74.50.+r
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